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The aim of this research is to study the characterization of modified poplar wood. A chemical impregnation was utilized before the poplar wood was dried and compressed in a multilayer hot-press drying kiln. The results showed that with the compression rate of 31.7%, the basic density, the over dried density and air-dried density of treated wood increased 25%, 75% and 74%, respectively. The bending...
The derivative of ceoftiam hexetil, which include a pair of isomers (the ratio of the isomers 1:1), was prepared and identified in this article. Two ?-3 isomers were separated by MCI-GEL CHP20P resin, and their structures were identified by NHR and HPLC. The ratio of the two isomers was calculated nearly 1:1, corresponded to the theoretical data. The ?-2 ceoftiam hexetil, which is side product of...
Isolation and purification of anthocyanins from mulberry by column chromatography were made, macroporous resins D101 was employed to purify the anthocyanin extracts from mulberry and Sephadex LH-20 was to further separate the anthocyanins in order to obtain more purified or individual anthocyanin. HPLC-ESI/MS analysis was used to identify the anthocyanins in mulberry. The results indicated that there...
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